used to make libaries.csv at https://github.com/Minecraft-Java-Edition-Speedrunning/legacy-fabric-instance-generator

libraries.py

import csv
import json
import os
import re

import requests
from packaging.version import Version

version_manifest_url = "https://launchermeta.mojang.com/mc/game/version_manifest.json"
libraries = {}
library_names = set()


def main():
    version_manifest_filename = version_manifest_url.split("/")[-1]
    if not os.path.exists(version_manifest_filename):
        with open(version_manifest_filename, "wb") as f:
            f.write(requests.get(version_manifest_url).content)
    with open("version_manifest.json", "r") as f:
        version_manifest: dict = json.load(f)
    if not os.path.exists("versions"):
        os.makedirs("versions")
    for version in version_manifest["versions"]:
        game_version: str = version.get("id")
        id_filename = f"versions/{game_version}.json"
        if not os.path.exists(id_filename) and re.match(r"^\d.\d{1,2}(.(\d){1,2})?$", game_version):
            with open(id_filename, "wb") as f:
                f.write(requests.get(version.get("url")).content)
    for file in os.listdir("versions"):
        with open(os.path.join("versions", file), "r") as f:
            info: dict = json.load(f)
            libs = info.get("libraries")
            version_libs = {}
            for lib in libs:
                package = lib.get("name")
                rules = lib.get("rules")
                package_name = package.split(":")[1]
                if len(package.split(":")) > 3:
                    package_name += "-" + package.split(":")[3]
                if rules is not None and not len(package.split(":")) > 3:
                    for rule in rules:
                        if rule.get("os") is not None:
                            package_name += "-"
                            os_name = rule.get("os").get("name")
                            if rule.get("action") == "disallow":
                                package_name += "!"
                            package_name += os_name
                library_names.add(package_name)
                version_string = package.split(":")[2]
                version_libs[package_name] = version_string
            libraries[info.get("id")] = version_libs
    library_names_list = list(library_names)
    library_names_list.sort()
    with open("libraries.csv", "w", newline="") as output:
        csv_writer = csv.writer(output)
        csv_writer.writerow(["version"] + library_names_list)
        sorted_versions = list(libraries.keys())
        sorted_versions.sort(key=Version)
        for version in sorted_versions:
            libs = libraries[version]
            csv_writer.writerow([version] + [libs.get(lib) for lib in library_names_list])


if __name__ == '__main__':
    main()